x <- as.integer64(sample(c(rep(NA, 9), 1:9), 32, TRUE))
x
sort(x)
message(
"the following has default optimize='time' which is faster ",
"but requires more RAM, this calls 'ramorder'"
)
order(x)
message("slower with less RAM, this calls 'ramsortorder'")
order(x, optimize="memory")
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